CHARLI Cassie Dress in Slate. - size US 4 / UK 8 (also in US 6 / UK 10) CHARLI Cassie Dress in Slate. - size US 4 / UK 8 (also in US 6 / UK 10) 100% lyocell. Hand wash cold. Unlined. Surplice front with wrap detailing. CHAR-WD50. JEDR6095. Charli is a London based womenswear brand and fashion retailer with stores in Muswell Hill and Hampstead, UK. As a collection, Charli was launched in 2008 with the intention of offering urban essentials with contemporary silhouettes to bring a fashionable edit of jersey and knitwear separates. The collection maintains an easy-luxe aesthetic at its core, continuing to work with softly draped shapes as well as high-end washing treatments and finishes.